Contract Liabilities (Tables)

3 Months Ended

Mar. 31, 2020

Contract Assets and Liabilities [Abstract]

Contract with Customer, Asset and Liability [Table Text Block]

	March 31,
	2020
	(millions)
Balance, beginning of period	$	33
Additions	2
Revenue recognized (a)	(1)
Balance, end of period	$	34

(a) Deferred revenue recognized is included in transportation, processing and other on the condensed consolidated statement of operations.